Brett T. Litz, PhD, is a Professor in the Department of Psychiatry at Boston University School of Medicine and the Department of Psychology at Boston University and the Associate Director of the Behavioral Sciences Division of the National Center for PTSD at the VA Boston Healthcare System. Dr. Litz is the Principal Investigator on several research studies funded by the National Institute of Health and the Department of Defense to explore the efficacy of early intervention strategies in trauma. He is also currently studying adaptation to traumatic loss as a result of 9-11. In addition to conducting research on early intervention for trauma, Dr. Litz conducts research on the mental health adaptation of US military personnel across the lifespan, the assessment and treatment of PTSD, and emotional numbing in trauma. In his capacity as Associate Director of the National Center for PTSD, Dr. Litz is responsible for overseeing educational activities pertaining to clinical care and research.